Metso Outotec Oyj

Prospectus • Oct 10, 2019

PROSPECTUS SUPPLEMENT DATED OCTOBER 10, 2019

This supplement to the Finnish language demerger prospectus dated October 7, 2019 (the "Prospectus"), which has been prepared for the combination of Outotec Oyj ("Outotec") and Metso Corporation's ("Metso") Minerals business ("Metso Minerals Business"), may not be sent to any person in the United States, Australia, Canada, Hong Kong, Japan or South Africa or any other jurisdiction in which its distribution would be unlawful. Except as expressly noted in the Prospectus, no offering has been made in or into any such countries.

Outotec supplements the Prospectus with the following information. This information should be read in conjunction with the Prospectus. Terms defined elsewhere in the Prospectus have the same meaning when used in this supplement to the Prospectus.

On October 8, 2019, Outotec and Metso published stock exchange releases relating to the credit ratings assigned to the future Metso Outotec Corporation.

Due to the publication of the releases, the section of the Prospectus entitled "Information about the Combined Company" is supplemented as follows:

1. The following chapter is included after chapter "Information about the Combined Company—Corporate Governance and Listing" on page 97 of the Prospectus:

Credit Rating

Metso and Outotec have obtained issuer credit ratings from both Moody's Investors Service ("Moody's") and S&P Global Ratings ("S&P") for the Combined Company. Moody's has assigned a 'Baa2' long-term issuer rating to the Combined Company. Simultaneously, S&P has assigned a preliminary 'BBB-' long-term issuer credit rating to Outotec, to be renamed Metso Outotec, on the proposed combination with the Metso Minerals Business. The outlook on both ratings is stable.